Organic electroluminescence device
AssigneesTsinghua University, Beijing Visionox Technology Co., Ltd.
InventorsYong Qiu, Yudi Gao, Deqiang Zhang, Liduo Wang
Life of this patent
Estimating the term…
Abstract
The present invention relates to an organic electroluminescence device comprising a substrate, an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and a cathode, wherein the electron injection layer contains alkali metal nitride and has a thickness of 0.2-10 nm. The organic electroluminescence device of the present invention has improved electron injection from the cathode to the organic layer, high device luminance and efficiency, long device lifetime, low material poisonousness, wide choice of film-forming thickness and low film-forming temperature.
Claims9
An organic electroluminescence device comprising a substrate (101), an anode (102) formed on the substrate, a light-emitting layer (105) formed on the anode, an electron injection layer (107) formed on the light-emitting layer, and a cathode (108) formed on the electron injection layer, characterized in that said electron injection layer contains alkali metal nitride.
A method for fabricating an organic electroluminescence device comprising:
- (1) placing a substrate comprising an anode into a vacuum chamber after cleaning and drying, and evaporating an organic light-emitting layer;
- or,
- placing a substrate comprising an anode into a vacuum chamber after cleaning and drying, evaporating a hole injection layer and/or a hole transport layer sequentially, and then evaporating an organic light-emitting layer;
- (2) evaporating an electron injection layer on the organic light-emitting layer;
- or,
- evaporating an electron transport layer and an electron injection layer on the organic light-emitting layer sequentially;
- wherein the evaporation rate of said electron injection layer is 0.08-2.50 Å/s, the thickness is 0.2-0.9 nm, and the evaporation temperature is 350° C.-500° C.;
- and
- (3) evaporating a cathode material on the electron injection layer.
Dependencies are inferred from the claim text.